CACHEFLUSH(2)                       Linux Programmer's Manual                       CACHEFLUSH(2)



NAME
       cacheflush - flush contents of instruction and/or data cache

SYNOPSIS
       #include <asm/cachectl.h>

       int cacheflush(char *addr, int nbytes, int cache);

DESCRIPTION
       cacheflush()  flushes the contents of the indicated cache(s) for the user addresses in the
       range addr to (addr+nbytes-1).  cache may be one of:

       ICACHE Flush the instruction cache.

       DCACHE Write back to memory and invalidate the affected valid cache lines.

       BCACHE Same as (ICACHE|DCACHE).

RETURN VALUE
       cacheflush() returns 0 on success or -1 on error.  If  errors  are  detected,  errno  will
       indicate the error.

ERRORS
       EFAULT Some or all of the address range addr to (addr+nbytes-1) is not accessible.

       EINVAL cache is not one of ICACHE, DCACHE, or BCACHE.

CONFORMING TO
       This Linux-specific system call is available only on MIPS-based systems.  It should not be
       used in programs intended to be portable.

BUGS
       The current implementation ignores the addr and nbytes arguments.   Therefore,  the  whole
       cache is always flushed.

COLOPHON
       This  page  is  part of release 3.74 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at http://www.kernel.org/doc/man-pages/.



Linux                                       2007-05-26                              CACHEFLUSH(2)